We have not been back since mid-Dec. Longest gap in 6 years. WoH has dis-incentivized me.
Taxi is definitely the same as described in the Wiki. No reservation, no calling; walk out of the station on the south side, across the street, and wait in line at MK taxi. You can read all about it on the hotel's website, and there is a map. Look under "News and Events".
Info on the 3000 yen coupon is no longer on the hotel website, so it may be suspended. The have often suspended it for periods in the past, and sakura season is approaching.
Never been a token or cert for the free drinks. You'll have to ask. We're so well known in the bar we just order and then nod on the way out. If they discontinue it I think the bartender would be embarrassed to tell us and since the bar went non-smoking we have not used this benefit at any of the other outlets. So you'll have to ask.